7066991851 has 16 divisors (see below), whose sum is σ = 7528701600. Its totient is φ = 6633479424.

The previous prime is 7066991831. The next prime is 7066991861. The reversal of 7066991851 is 1581996607.

7066991851 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-7066991851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7066991831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2056831 + ... + 2060263.

It is an arithmetic number, because the mean of its divisors is an integer number (470543850).

Almost surely, 2^7066991851 is an apocalyptic number.

7066991851 is a deficient number, since it is larger than the sum of its proper divisors (461709749).

7066991851 is an equidigital number, since it uses as much as digits as its factorization.

7066991851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3903 (or 3869 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 52.

The square root of 7066991851 is about 84065.4022235069. The cubic root of 7066991851 is about 1919.0142374499.

The spelling of 7066991851 in words is "seven billion, sixty-six million, nine hundred ninety-one thousand, eight hundred fifty-one".